注解配置AOP切面编程

1、导入先关jar包

2、编写applicationContext.xml,配置开启注解扫描和切面注解扫描

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:c="http://www.springframework.org/schema/c"
	xmlns:cache="http://www.springframework.org/schema/cache"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
		http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.0.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
	
	<context:component-scan base-package="com.wh.aop"></context:component-scan> 
	<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
	
</beans>　　

3、编写被切的类

package com.wh.aop;

import org.springframework.stereotype.Component;

@Component
public class Computer {

	public void play01(){
		System.out.println("play01玩家");
	}
	
	public String play02(){
		System.out.println("play02玩家");
		return "play02";
	}
	
	public String play03(){
		System.out.println("play03玩家");
		return "play03"+(10/0);
	}
	
	public String play04(){
		System.out.println("play04玩家");
		return "play04";
	}
	
	
}

4、编写切面类

package com.wh.aop;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class AopProxy {
	
	@Pointcut("execution(* com.wh.aop.Computer.play01(..))")
	public void cp(){}
	
	@Before("cp()")
	public void doBefore(JoinPoint p){
		System.out.println("前置通知！");
	}
	
	@AfterReturning(value="execution(* com.wh.aop.Computer.play02())",returning="result")
	public void doAfterReturning(JoinPoint p,Object result){
		System.out.println("后置通知   "+result);
	}
	
	@After("execution(* com.wh.aop.Computer.play02())")
	public void doAfter(JoinPoint p){
		System.out.println("最终通知   ");
	}
	
	@AfterThrowing(value="execution(* com.wh.aop.Computer.play03())",throwing="e")
	public void doAfterThrowing(JoinPoint p,Throwable e){
		System.out.println("异常通知：   "+e);
	}
	
	@Around("execution(* com.wh.aop.Computer.play04())")
	public void doAround(ProceedingJoinPoint p){
		System.out.println("前置通知");
		Object obj=null;
		try { 
			obj=p.proceed();
		} catch (Throwable e) {
			System.out.println("异常通知：   "+e.getMessage());
		}finally{
			System.out.println("最终通知！");
		}
		System.out.println("后置通知！"+obj);
	}
	
}

5、编写测试类

package com.wh.aop;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestAop {

	@Test
	public void testdoBefore(){
		ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
		Computer c=(Computer)ac.getBean("computer");
		c.play01();
	}
	/*
	     前置通知！
	     play01玩家
	 */
	
	@Test
	public void testdoAfterReturning(){
		ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
		Computer c=(Computer)ac.getBean("computer");
		c.play02();
	}
	/*
	     play02玩家
	     后置通知   play02
	 */
	
	@Test
	public void testdoAfter(){
		ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
		Computer c=(Computer)ac.getBean("computer");
		c.play02();
	}
	/*
	      play02玩家
	      最终通知   
	      后置通知   play02
	 */
	
	
	@Test
	public void testdoAfterThrowing(){
		ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
		Computer c=(Computer)ac.getBean("computer");
		c.play03();
	}
	/*
	       play03玩家
               异常通知：   java.lang.ArithmeticException: / by zero
	 */
	
	@Test
	public void testdoAround(){
		ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
		Computer c=(Computer)ac.getBean("computer");
		c.play04();
	}
	/*
	   	前置通知
		play04玩家
		最终通知！
		后置通知！play04
	 */	
	
}